Actually, rituals (aka: rituals), clearly do not always have a connection to some "spiritual" (aka: religious) ceremony.
Ceremonial rituals can only be connected with spiritual beliefs. There is no physical reason for them and you can't explain one into existence because you want me to be wrong.
Why do you assume your silly "because I say so" claims are taken seriously?
Because you can't explain ceremonial rituals which have a physical purpose or reason. Ceremonial rituals have no physical benefits. Go ahead... try to come up with any ceremonial ritual and define the physical benefits of the actual ritual and ceremony.
It's like... If we found evidence of ancient civilizations praying and meditating and you tried to deny that was "spiritual" because maybe they were doing yoga... err.. palates... err... aerobics! Whew, had to struggle to find a non-spiritual ritual there! Ceremonial ritual burials using red ocher, burying artifacts with the dead, sending them off into the afterlife... these are spiritual practices. They have no physical purpose or reason.
What is so wonderfully ironclad is, even IF you could find a physically beneficial reason for ceremonial rituals, you will have proven human spirituality valid in the process. Quite the conundrum.